639
FNUS71 KLWX 211613
FWSLWX
SPOT FORECAST FOR SPRUCE KNOB FIRE...US FOREST SERVICE
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1213 PM EDT TUE MAY 21 2013
FORECAST IS BASED ON REQUEST TIME OF 1205 EDT ON MAY 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
HIGH PRESSURE WILL REMAIN OFFSHORE THROUGH THURSDAY. ASSOCIATED
SOUTHERLY FLOW AND WARM AND HUMID CONDITIONS WILL LEAD TO SOME
SHOWERS AND THUNDERSTORMS...ESPECIALLY DURING THE AFTERNOON AND
EVENING HOURS EACH DAY. A COLD FRONT WILL PASS THROUGH THE AREA
THURSDAY NIGHT INTO FRIDAY AND MUCH COOLER CONDITIONS ARE EXPECTED
BEHIND THIS BOUNDARY FOR MEMORIAL DAY WEEKEND.
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY (45-55 PERCENT). A SLIGHT CHANCE
OF SHOWERS AND THUNDERSTORMS EARLY IN THE
AFTERNOON. A CHANCE OF SHOWERS AND
THUNDERSTORMS LATE.
MAX TEMPERATURE.....AROUND 77.
MIN HUMIDITY........52 PERCENT.
WIND (20 FT)........LIGHT AND VARIABLE WINDS...BECOMING SOUTHWEST
AROUND 6 MPH LATE. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON.
CWR.................10 PERCENT...INCREASING TO 50 PERCENT.
MIXING HEIGHT.......4600-6100 FT AGL...INCREASING TO 6600-6800 FT
AGL LATE.
TRANSPORT WINDS.....SOUTHWEST 6 TO 13 MPH...INCREASING TO AROUND 16
MPH LATE.
TIME (EDT) NOON 2 PM 4 PM
SKY (%).........49 40 53
WEATHER COV..... S CHC CHANCE
WEATHER TYPE....NONE RNSHWR RNSHWR
TEMP............74 76 76
RH..............62 52 52
20 FT WIND......W 3 SW 2 SW 5
20 FT WIND GUST.7 7 11
CWR.............10 30 50
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (55-65 PERCENT). SCATTERED
SHOWERS AND THUNDERSTORMS IN THE EVENING...THEN
ISOLATED SHOWERS AND THUNDERSTORMS LATE IN THE
EVENING.
MIN TEMPERATURE.....AROUND 62.
MAX HUMIDITY........73 PERCENT.
WIND (20 FT)........WEST WINDS 6 TO 7 MPH. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS IN THE EVENING.
CWR.................50 PERCENT...DECREASING TO 10 PERCENT.
MIXING HEIGHT.......4600-6200 FT AGL...DECREASING TO 300-1200 FT
AGL.
TRANSPORT WINDS.....WEST 9 TO 17 MPH...DECREASING TO 7 TO 10 MPH
AFTER MIDNIGHT.
TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
SKY (%).........59 65 65 65 65 58
WEATHER COV.....SCTTRD SCTTRD CHANCE
WEATHER TYPE....RNSHWR RNSHWR RNSHWR NONE NONE NONE
TEMP............75 72 69 67 65 64
RH..............54 59 66 70 70 70
20 FT WIND......SW 6 SW 6 SW 6 W 5 W 5 W 5
20 FT WIND GUST.11 11 11 7 7 7
CWR.............50 50 40 10 10 10
WEDNESDAY
SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT). A CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.....AROUND 75.
MIN HUMIDITY........62 PERCENT.
WIND (20 FT)........SOUTH WINDS 6 TO 9 MPH. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON.
CWR.................10 PERCENT...INCREASING TO 50 PERCENT.
MIXING HEIGHT.......500-1600 FT AGL...INCREASING TO 3300-5200 FT
AGL LATE IN THE MORNING...THEN INCREASING TO
5900-7200 FT AGL IN THE AFTERNOON...DECREASING
TO 4000-4900 FT AGL LATE.
TRANSPORT WINDS.....SOUTHWEST 13 TO 21 MPH...INCREASING TO 23 TO 25
MPH LATE.
TIME (EDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
SKY (%).........51 51 47 48 53 58
WEATHER COV..... S CHC S CHC CHANCE CHANCE CHANCE
WEATHER TYPE....NONE RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR
TEMP............64 66 70 72 74 74
RH..............73 73 68 66 62 62
20 FT WIND......W 5 W 6 W 6 SW 7 SW 7 S 6
20 FT WIND GUST.7 11 11 11 11 11
CWR.............10 30 30 50 50 50
FORECASTER...SILVERMAN
REQUESTED BY...CAMERON CRISP
TYPE OF REQUEST...WILDFIRE
.TAG 20130521.SPRUC.01/LWX
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